The invention discloses a three coordinate converting machine for integrated testing of quality characteristics. An arc substrate is provided with an arc surface matched with arc guide rails, and a horizontal plane used for fixedly mounting the arc substrate; two arc guide rails are respectively arranged on the arc surface of the arc substrate, and arc sections of the arc guide rails are parallelto an arc section of the arc substrate; a slipway is arranged on the arc guide rails and slides along the arc guide rails under the action of a driving mechanism; the slipway can rotate along the normal direction of each point of the arc sections of the arc guide rails; the driving mechanism is arranged in the arc substrate; and a workpiece to be tested is arranged on the slipway, and the automatic conversion between quality characteristic parameters of the workpiece to be tested at a vertical position under Cartesian coordinates and quality characteristic parameters of the workpiece to be tested at any position under the Cartesian coordinates is realized through the movement of the slipway on the arc guide rails. The three coordinate converting machine has simple structure and convenientoperation, and can be used for integrated testing of the quality characteristics of large equipment such as spacecrafts and the like.